How many years does it take deciduous trees to grow?

it depends on the tree. Depending on what kind of tree you are growing it will take differnt amounts of time to grow out of the ground.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.